Card



Oct. 25, 1932. A. THIBEAU 1,884,381

CARD

Filed Aug. 21, 1950 Mme/V1711 WWW slg/L Patented Oct. 25, 1932 mama PFIC'E ANTOINE THIBEAU, 0F TOURC'OING, FRANCE CARI) Application filedAugust 21,

It is known that with a view to separating and rejecting foreign bodiesof any kind from textile fibres during the carding operation (forexample and particularly from Wool and other similar fibres) the cardingmachines are provided with rollers generally called burr-heaters whichare driven at a high speed of rotation and provided with a varyingnumber of blades arranged radially along generating lines, the rollersbeing placed on the periphery of various rollers of the cards, in theclothing of which rollers, the textile material undergoing treatment isengaged.

It is also known that the fibres become nor- 7 mally lodged between thepoints of the clothing while the foreign bodies such as burrs and otherWaste, which are larger than the free space between the points of theclothing, remain on the periphery of the carding rollers, and that thefunction of the burrbeaters is to strike the foreign bodies as they passand are driven off from the card, for example on a plate or in a troughplaced in front of the burr-beater.

Now the rapid movement of the burr-beater in the atmosphere puts aconsiderable quantity of air into circulation, and it is known that itsventilating action has among other effects that of carrying along withthe burr-beater or removing from the card a certain quantity of goodfibres at the same time as the foreign bodies. It has been recognized tobe useful to cover each burr-beater with a casingcalled a cover forreducing the objections due to the circulation of the air, this coverbeing generally made of sheet metal and being substantiallycircumferential with the burr-beater and surrounding it with a clearanceof some millimetres from its periphery up to some centimetres at thepoint of contact of the burr-beater and the carding roller upon which itworks, thus leaving a front aperture or longitudinal orifice along theburr-beater through which the materials rejected by the burr-beaterpass.

The burr-heaters provided with such a casing or cover then only carryalong with them in their movement of rotation a quantity of air which(for a given radial clearance be- 1930, Serial No. 476,920, and inFrance December tween the periphery of each burr-beater and its cover)is in proportion with the surface of the opening or longitudinal orificedefined above, and in this way it has been possible to reduceconsiderably the objectionable ventilating action described above.

However, the ventilating action may have in addition a useful actionupon the removal by the burr-heaters of foreign bodies which may be verysmall and as the various textile fibres are, according to their nature,more or less affected by this ventilating action, the object of thepresent invention is to vary the ventilating action of the burr-heatersaccording to the actual nature and needs of the various textilematerials to be treated, in order to make it possible to remove foreignbodies, even the smallest, without producing an unnecessary rejection ofgood fibres.

For this purpose the object of the invention is to render the frontlongitudinal aperture or orifice of the cover adjustablein any mannerand by any suitable means, this adjustment of the aperture beingpreferably effected by hand during the working of the card and beingeffected either substantially tangentially or circumferentially to theburrbeate In order to enable the invention to be clearly understood andby way of example, some constructional forms are hereinafter I describedby way of example and diagrammaticall?" in the accompanying drawing, inwhich: I

Figure 1 is a cross section of an improved installation according to theinvention, in which the cover comprises a movable screen adjustablesubstantially tangentially and adapted to move rectilinearly andparallel to the tangent in a direction which is vertical or otherwisewith respect to the burr-beater.

Figure 2 is a front *iew of this arrangement. I

Figure 3 is a cross section of anotherembodiment of an installationaccording to which the movable screen is adjustable concentrically withthe burr-beater.

Figure 4 is a front view of this latter arrangement. A

In these figures:

1 represents a burr-beater on a card roller 2, these rollers turning inthe direction indicated by the arrows; 3 is the cover, 4 the plate ortrough for receiving the foreign bodies rejected.

The cover 3 is provided with an adjustable screen 5 represented assubstantially vertically tangential to the burr-beater 1 and thedislacement of which permits the size of the orifice to be variable andregulated tangentially to the burr-beater 1. This displacement isobtained by making the screen 5 effect an n ward and downward movementwhich is e ected from each end and if required at intermediate points,by operating screwthreaded rods 6 having a milled head the rotation'ofwhich causes a nut 8 rigid with the movable adjustable screen 5 to riseand fall on account of the fact that the smooth cylindrical ends ofthese screw threaded rods are engaged in socket 7 With regard to Figuresand 4, the cover 3 is provided with ascreen 5 the profile of which ispreferably concentric with the burrbeater 1 and may comprise visor 9.

This screen is mounted at its upper edge to a bar 10 the screw threadedends of which are guided in slotted arcuate guides 11 ciricumferentialwith the burr-beater 1 and mounted at each end of the cover 3 theadjustable screen 5 being locked by tightening the milled nuts 12 on tothe guides 11.

It is clearly understood that without going outside the scope of theinvention changes, modifications and improvements may be made and alsothat equivalent means may be employed.

What I claim is 1. In a separating arrangement of the type having a cardroller with a burr beating roller arranged thereabove and having areceiving trough located laterally of the card roller and rearwardly ofthe burr beating roller and also having a covering casing arranged aboveand circumferentially about the burr beating roller so as to leave anopening between said casing and trough, a shielding screen mounted onthe covering casing adjacent the upper edge of the opening, and meansfor adjustably fastening the screen in various positions on the casingand with respect to the adjacent edge of the trough so as to vary thesize of the openin 2. A separating arrangement as claimed in claim 1,wherein the screen is provided with an apertured flange and wherein themeans for adjustably fastening the screen on the casing includes screwsrotatably mounted on the casing and over which the apertured flange isengaged, and nuts carried on the flange about the opening and movable onrotation of the screws to adjust the screen.

3. A separating arrangement as claimed in claim 1, wherein the cover iscurved in cross section and wherein the adjustable fastening meansincludes slotted arcuate guides on the casing, a longitudinal rod fixedto the screen and adjustable in the guides, and means engageable withthe ends of the rod for clamping them in various positions on theguides.

In testimony whereof I afiix my signature.

ANTOINE THIBEAU.

